... contact us for inquiry.Size Available: Q series: AQ, BQ, NQ, HQ, PQ,BQ3, NQ2, NQ3, HQ3, PQ3...T2 series ... HWTOthers: NMLC, HMLC, LTK48, LTK60,EWK, AWK.Note:Impregnated Diamond Core Bit:Impregnation Depth: 6-12mm; 6mm is "Forsun" standard depthBit ... Flat" profile, "Semi-round" profile, "Cross" profile...Surface Set Diamond Core Bit:Bit Crown Profiles: "Semi-round" profile, "Step" profile...Welcome to ...